Built in 1978, by the Cenac Shipyard Incorporated of Houma, Louisiana (hull #20) as the Casey Cenac for the Cenac Towing Company Incorporated of Houma, Louisiana.
In 2004, the tug was acquired by Settoon Towing Incorporated of Pierre Part, Louisiana. Where she was renamed as the Megan B. Settoon.
In 2006, Settoon Towing Incorporated renamed the tug as the B. Settoon.
In 2015, she went out of documentation. Her current, and or final disposition is unknown. She was a a single screw tug, rated at 580 horsepower.